But infrared is only the at the very end of the visible light spectrum, just as unltraviolet is at the opposite end. It isn't the lowest frequency of the electromagnetic spectrum; beyond infrared you have microwaves and radio waves.

As I stated, though, your version of "common knowledge" is different from what the science actually says, as I explained in my previous post. I thought there was a small possibility you might be able to quote a source this time.